Double-sided advertising machine



FIG. 1 is a top, front and right perspective view of a double-sided advertising machine showing our new design;

FIG. 2 is a front view thereof, the rear view being a mirror image thereof;

FIG. 3 is a left side view thereof, the right side view being a mirror image thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a bottom, front and right perspective view thereof. 

CLAIM The ornamental design for a double-sided advertising machine, as shown and described. 